The extension requests permission to access data across websites.
That broad permission enables tracker detection and blocking on visited pages, so users should install it only from a trusted source.
Evidence source ↗
Privacy Badger
Privacy Badger is a free, open-source browser extension from EFF that learns to block third-party trackers and sends Global Privacy Control and Do Not Track signals.
Editorial overview
Aggregated Overview
The feature assessment reflects documented tracker blocking, GPC and DNT signals, cookie controls, and click-to-activate widgets. The extension is free; the sentiment indicator reflects the Chrome Web Store rating, not TechZella reviews. No hands-on testing was conducted.
This profile combines documented product information and independent evidence where available. It is not a hands-on test unless TechZella explicitly identifies one.
Privacy Badger Decision Snapshot
A quick way to understand who this product may suit, where its limits matter, and which facts are most relevant before you compare alternatives.
Best suited to
Individuals seeking a free browser extension that blocks observed third-party tracking and sends privacy opt-out signals with little routine configuration.
Look elsewhere if
Users who want comprehensive ad removal, broad first-party tracking protection, or a standalone mobile app. Privacy Badger focuses mainly on third-party tracking and does not block every ad, and should evaluate alternatives such as Ghostery or uBlock Origin instead.
Platforms
Browser Extension, Chrome, Firefox, Microsoft Edge, Opera
TechZella assessment
8.6/10
Overview
Privacy Badger is a free browser extension developed by the Electronic Frontier Foundation. It aims to limit cross-site tracking by observing third-party domains embedded in pages and blocking domains it identifies as tracking.
The extension sends Global Privacy Control and Do Not Track signals. EFF describes the product as focused primarily on third-party tracking, rather than comprehensive ad blocking or broad protection against tracking by sites a user visits directly.
Privacy Badger — What Sets It Apart?
These are the product-specific differences that may matter when deciding whether the software fits your workflow. They are based on documented evidence rather than a universal ranking.
- Uses observed tracker behavior alongside GPC and Do Not Track signals rather than relying solely on a manually curated blocking list.
- Provides click-to-activate placeholders for some embedded widgets and removes outgoing link click tracking on Facebook and Google.
- Developed by EFF, a nonprofit organization, and released as free software under GPLv3+.
6 key claims verifiedOur editorial team checked this profile against vendor documentation, company information. Supported by 2 documented sources.
Privacy Badger Pros & Cons
Pros
- Free to use, with open-source code under GPLv3+.
- Automatically detects and blocks observed third-party tracking without requiring users to maintain filter lists.
- Sends Global Privacy Control and Do Not Track signals.
- Offers site-specific controls and click-to-activate placeholders for some embedded widgets.
Cons
- Does not aim to block every advertisement.
- Protection primarily targets third-party tracking, with limited documented first-party protections.
- EFF says detection of several fingerprinting methods and first-party fingerprinting protections remain ongoing work.
- Requires broad website permissions to inspect and block trackers across visited sites.
Privacy Badger Gotchas & Operational Limits
These are documented constraints or practical friction points that may matter before you adopt the product.
Privacy Badger is not a general-purpose ad blocker and does not block every ad.
Users seeking broad advertisement filtering may need a different or additional tool, subject to compatibility considerations.
Evidence source ↗Tracker blocking can affect site features, including embedded media.
Users can disable the extension on a specific site or use a click-to-activate placeholder when supported.
Evidence source ↗Security & Privacy
For security-sensitive software, TechZella focuses on documented architecture, authentication, data handling, deployment and privacy details that can affect a buying decision. This is product research, not an independent security audit.
Security posture at a glance
| Deployment | Installed locally as a browser extension |
|---|---|
| Data collection | EFF says browsing data is not shared unless the user chooses to submit a broken-site report. |
What the documented evidence tells us
EFF describes the product as a free browser extension and identifies EFF as its developer.
Source ↗EFF's FAQ says both signals are sent by default.
Source ↗EFF states that its current protections primarily address third-party sites and identifies limited first-party link-tracking protections.
Source ↗The official FAQ identifies the software license and links to the source repository.
Source ↗Security claims are presented only when supported by documented sources. The presence of this section does not constitute a penetration test, certification or independent security audit.
Privacy Badger Pricing & Plans
Free
$0
ongoing
Free browser extension. EFF accepts voluntary donations; no paid plan or trial is listed.
Check current pricing →Pricing may change. Verify current plans on the vendor's website.
Privacy Badger Competitors & Alternatives
Compare similar products directly, then see which alternatives may make more sense when your requirements differ.
Direct competitors
These products address broadly similar requirements. The descriptions focus on documented reasons a buyer might compare them with Privacy Badger.
Privacy Badger Features
Tracker protection
- Observes third-party domains embedded in visited webpages and blocks domains it identifies as tracking.
- Sends Global Privacy Control and Do Not Track signals.
- Restricts third-party cookies for certain domains rather than blocking their content entirely.
User controls
- Provides per-domain controls in the extension menu.
- Allows users to disable protection for an individual site.
- Can replace certain embedded widgets with click-to-activate placeholders.
Privacy controls
- Removes outgoing link click tracking on Facebook and Google.
- Detects canvas-based fingerprinting by third-party domains; EFF says other fingerprinting protections remain ongoing work.
Demo & Screenshots
Privacy Badger Specifications
| Developer | Electronic Frontier Foundation (EFF) |
|---|---|
| Price | Free |
| License | GPLv3+ |
| Platform | Browser extension for Chrome, Firefox, Edge, Opera, Brave, and Firefox for Android; verify store availability by browser. |
| API | No public API documented |
| Integrations | No third-party integrations catalog documented |
| Free trial | Not applicable; the extension is free |
| Deployment | Installed locally as a browser extension |
| Data collection | EFF says browsing data is not shared unless the user chooses to submit a broken-site report. |
| Support | EFF email support and GitHub issue tracker |
Deployment & System Footprint
Verified installation, hosting, administration, or environment details that can affect implementation.
| Installation or hosting | Installed as a browser extension from browser extension stores or EFF-provided downloads; it is not a hosted web service. Source ↗ |
|---|
Our evidence-based assessment
TechZella Score
A proprietary editorial score based on product capabilities, usability, value, performance, support and user sentiment evidence.
8.6/10Moderate confidence
The feature assessment reflects documented tracker blocking, GPC and DNT signals, cookie controls, and click-to-activate widgets. The extension is free; the sentiment indicator reflects the Chrome Web Store rating, not TechZella reviews. No hands-on testing was conducted.
Methodology v1.0. The assessment weighs feature coverage (25%), ease of use (15%), value for money (20%), performance (15%), support (10%) and user sentiment (15%), using researched product evidence and verified review evidence where available. It is a TechZella editorial assessment, not a direct user-review average.
Editorial transparency
Our Review Methodology
Key claims are linked to the sources used to verify them. This evidence record is separate from third-party user ratings.
TechZella evaluates software using documented product capabilities, pricing information, usability and value considerations, independent user evidence where available, and competitive context. The assessment is an editorial review, not a hands-on test unless one is explicitly identified. Our editorial assessment is based on 2 documented sources.
What TechZella adds
- Uses observed tracker behavior alongside GPC and Do Not Track signals rather than relying solely on a manually curated blocking list.
- Provides click-to-activate placeholders for some embedded widgets and removes outgoing link click tracking on Facebook and Google.
- Developed by EFF, a nonprofit organization, and released as free software under GPLv3+.
Important limitations
- EFF says protection primarily targets third-party tracking; first-party protections are limited to outgoing link tracking on Facebook and Google.
- It is not designed to block all advertisements; ads may remain when they are not detected as third-party tracking.
- The extension needs broad website access permissions to inspect and block tracking across visited sites.
- EFF documents that some fingerprinting detection remains ongoing, including other forms of fingerprinting and first-party fingerprinting.
Evidence-backed claimsPrivacy Badger is a free browser extension made by EFF. The extension learns to block third-party domains observed tracking across sites. Privacy Badger sends Global Privacy Control and Do Not Track signals. Privacy Badger primarily protects against third-party tracking. Privacy Badger's source code is licensed under GPLv3+. The latest release found during research was version 2026.9.15.
EFF describes the product as a free browser extension and identifies EFF as its developer.
View source ↗Verified 2026-10-05EFF documents that it observes third-party domains and blocks a tracker after detecting tracking behavior across multiple sites.
View source ↗Verified 2026-10-05EFF's FAQ says both signals are sent by default.
View source ↗Verified 2026-10-05EFF states that its current protections primarily address third-party sites and identifies limited first-party link-tracking protections.
View source ↗Verified 2026-10-05The official FAQ identifies the software license and links to the source repository.
View source ↗Verified 2026-10-05EFF's GitHub releases page identifies 2026.9.15 as the latest release and summarizes its fixes.
View source ↗Verified 2026-10-05Community feedback
Reviews
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FAQ
Is Privacy Badger free? Yes. EFF describes it as a free browser extension.
Does it block every ad? No. EFF says it is primarily a privacy tool, not an ad blocker; ads may be blocked when they are part of detected tracking.
Does it work on Android? EFF directs Android users to Firefox for Android and lists an Edge for Android installation option. Chrome on Android does not support extensions, according to EFF.
Does it have an API or integrations? No public product API or third-party integration catalog was found in the official product materials reviewed. Its supported browser extension stores are distribution channels, not integrations.
Is a free trial available? No trial is listed because the extension is free.
Does it stop fingerprinting? EFF says it can detect canvas-based fingerprinting by third-party domains, while other forms of fingerprinting detection and first-party protection remain ongoing work.
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